#253FB1#253FB1

#253FB1 is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.7% C 0.183 H 267.6°. Best body text is #FFFFFF at 8.66:1 contrast (WCAG AA passes).

Color values

HEX	#253FB1
RGB	rgb(37, 63, 177)
HSL	hsl(229, 65%, 42%)
HSV	hsv(229, 79%, 69%)
CMYK	cmyk(79.1%, 64.4%, 0%, 30.6%)
CIE-LAB	lab(32.08, 32.46, -63.16)
CIE-LCH	lch(32.08, 71.01, 297.20°)
OKLab	oklab(42.72% -0.0077 -0.1828)
OKLCH	oklch(42.72% 0.183 267.6)
XYZ	xyz(10.4735, 7.1215, 42.4090)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#253FB1 #B19725

analogous

#2585B1 #253FB1 #5125B1

triadic

#253FB1 #B1253F #3FB125

tetradic

#253FB1 #B12585 #B19725 #25B151

square

#253FB1 #B12585 #B19725 #25B151

split-complementary

#253FB1 #B15125 #85B125

monochromatic

#101B4C #1A2D7E #253FB1 #3D59D6 #6F85E1

Accessibility & contrast

On white

8.66

#253FB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#253FB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #253FB1

8.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##253FB1	#FFFFFF	#000000	##FFFFFF
##253FB1	1.00	8.66	2.42	8.66
#FFFFFF	8.66	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B5

Deuteranopia (green-blind)

#0045AF

Tritanopia (blue-blind)

#005D72

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #253fb1;
/* rgb */ color: rgb(37, 63, 177);
/* oklch */ color: oklch(42.7% 0.183 267.6);

Tailwind

colors: {
  custom: {
    50: '#7774c9',
    500: '#253fb1',
    950: '#000000',
  },
}

SCSS

$custom: #253fb1;
$custom-light: #7774c9;
$custom-dark: #000000;

JSON

{
  "hex": "#253fb1",
  "rgb": {
    "r": 37,
    "g": 63,
    "b": 177
  },
  "hsl": {
    "h": 228.857,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.42715,
    "c": 0.18293,
    "h": 267.6
  },
  "luminance": 0.07123
}

Semantic roles & 50–950 ramp

primary

#253FB1

secondary

#C8B66A

accent

#C93FE8

background

#F8F7FC

surface

#EFEDF8

border

#CAC8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #253FB1

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →